Methane Emissions from Grazing Cattle Using Point-Source Dispersion
SM McGinn, D Turner, N Tomkins, E Charmley, G Bishop-Hurley, D Chen
Journal of Environmental Quality | AMER SOC AGRONOMY | Published : 2011
The ability to accurately measure greenhouse gas (GHG) emissions is essential to gauge our ability to reduce these emissions. Enteric methane from ruminants is an important but often difficult source to quantify since it depends on the amount and type of feed intake. Unfortunately, many of the available measurement techniques for estimating enteric methane emissions can impose a change in feed intake. Our study evaluates a nonintrusive technique that uses a novel approach (point-source dispersion with multiple open-path concentrations) to calculate enteric methane emissions from grazing cattle, reported as the major source of GHG in many countries, particularly Australia. A scanner with a mo..View full abstract
Funding for this study came from Meat and Livestock Australia and CSIRO McMaster Fellowship. The authors thank Trevor Coates for his assistance with the field instruments and Rob Young and staff at Belmont Research Station for handling cattle.